Supercooled liquid region in Zr-Cu based bulk amorphous alloys

Phase formation and thermal stability in Cu–Zr–Ti(Al) metallic glasses

“…The values are in good agreement with data published in the literature: Altounian et al [16] for instance reported a Kissinger activation energy of 4.5 eV for Cu 50 Zr 50 . Yet, for Cu 50 Zr 40 Ti 10 activation energies of 516 kJ/mol (5.3 eV) [37] and 480 kJ/mol (4.9 eV) [64] have been measured. Both values are considerably higher than the value of 422 kJ/mol (4.4 eV) obtained in the present work.…”

“…The best glass-forming ability (GFA) among the binary alloys has been found on the Cu-rich side (eg. Cu 64 Zr 36 and Cu 65 Zr 35 ) [16][17][18][19]. In terms of ternary alloys the Cu-Zr-Al as well as the Cu-Zr-Ti system are probably the most prominent ones [5][6][7][8][9][10][11][12][13][14][15][16][17].…”

Undercooled Melt Formation by Melting of Metastable Eutectic Structure in Al<SUB>2</SUB>O<SUB>3</SUB>-Y<SUB>2</SUB>O<SUB>3</SUB>-ZrO<SUB>2</SUB> System

“…In some exceptional cases, heating amorphous alloys produces undercooled melt. [17][18][19][20][21][22][23][24] In the case of the Al 2 O 3 -Y 2 O 3 system, it is emphasized that the undercooled melt is produced by heating the metastable eutectic structure consisting of crystal phases. 16) Uniform Al 2 O 3 -YAG eutectic structure with sub-micron order in spacing was formed when solidification in the equilibrium path was accompanied by the melting of the metastable eutectic structure.…”

“…It is well known that a large supercooled liquid region is found in multicomponent systems for metallic alloy systems. [17][18][19][20][21][22][23][24] 28) This paper focuses on the eutectic selection and the undercooled melt formation in the Al 2 O 3 -Y 2 O 3 -ZrO 2 pseudo-ternary system. Firstly, criterion for selection of the eutectic systems is examined in terms of maximum melt temperature by using an optical DTA apparatus.…”

Amorphous and Nanocrystalline Metallic Alloys

“…Usually kinetic and structural criteria are also discussed [8][9][10]. Some alloys may be prepared as amorphous will have less cooling rate [11][12][13][14][15][16][17][18][19][20][21][22][23][24].…”